论文标题
量子理论及以后的时间对称性
Time symmetry in quantum theories and beyond
论文作者
论文摘要
量子理论的不同公式之间存在着鲜明的张力，因为有些是固有的时间对称性，而另一些则是时间对称。当将物理理论视为过程理论时，这种张力被清晰地捕获。我们介绍了量子物理学的过程理论，即Qphys，该过程将经典系统视为量子理论的内部。我们提供三种将时间对称性纳入QPHY的方法。第一个将QPHY的过程理论限制在满足额外倒流限制的过程中。第二种是一种新颖的方法，它扩展了因果关系和倒退性的概念，可与过程一起应用于系统。利用这种方法，我们为粒子物理学创建了一个玩具模型，在该模型中，因果关系和倒角系统分别对应于颗粒和抗粒子。第三种方法将qphys扩展到不满足因果关系或倒层约束的超级理论。为了避免非物理预测，我们修改其组成规则或过程。
There exists a stark tension among different formulations of quantum theory as some are inherently time-symmetric while others are time-asymmetric. This tension is crisply captured when considering physical theories as theories of processes. We present the process theory of quantum physics, QPhys, which treats classical systems as internal to quantum theory. We provide three ways to incorporate time symmetry in QPhys. The first restricts the process theory of QPhys to one that satisfies an additional retrocausality constraint. The second is a novel approach, which extends the notions of causality and retrocausality to apply to systems along with processes. Utilizing this approach, we create a toy model for particle physics , where the causal and retrocausal systems correspond to particles and anti-particles respectively. The third approach extends QPhys to a supertheory that satisfies neither a causality nor a retrocausality constraint. To avoid unphysical predictions we modify either its composition rule or its processes.
